Tree density and fertilization regime effect on pasture biodiversity in a silvopastoral system established under Pinus radiata D. Don

摘要

Land use change, such as afforestation, has been one of the most important goals achieved in the last years at a European level. Promotion of afforestation and agroforestry systems can later affect biodiversity in either a positive or negative way. The objective of this work is to evaluate the effect of two different tree densities (established at 2500 and 833 trees ha~(-1)) of Pinus radiata D. Don, and three types of fertilization (no fertilization, inorganic fertilization and organic fertilization)on alpha (Simpson index) and beta (Jaccard index) biodiversity. Canopy development reduced biodiversity as there was no seed bank with shade-adapted species present. When no richness biodiversity parameter was affected, the relative composition under each kind of agroforestry system was clearly modified over time.